Sun is king of all planets, indicates Nobility, Individuality, Generosity, Dignity, Proudness, AUTHORITY, leadership, Creativity ,Egotism, Selfishness, despotism, Self centeredness.
Mercury represents communication skills, marketing, Mathematics, younger siblings, skills with hands, intelligence, logical thinking, youthfulness etc. It caters to the area which is very important in human life, which is the cornerstone of success and achievement.